Python has never been a language I have had to know well. I’ve adapted existing scripts, I’ve created a few simple scripts from scratch. But I haven’t learnt it properly, just the parts I’ve needed. I decided it was about time I learnt the language properly. A friend recommended that I take a look at python koans....
You’ve read the books on Refactoring, on working with legacy code, on Unit Testing and on TDD. Then you look at the codebase you’ve inherited, it’s written in C, and it’s riddled with conditional compilation. Where do you start? In years gone by feature flags were widely used in embedded systems as a means of having...
I was recently working in the CODESYS runtime again, developing some components for a client and I thought the experience wold make the basis of a good post on bringing legacy code into a test environment, to enable Test Driven Development (TDD)The CODESYS runtime is a component based system, and for most device manufacturers is...
Today I have released CODESYS for UniPi for free download from the CODESYS store. This package adds a comprehensive set of drivers to CODESYS for Raspberry Pi allowing full use of the features of the UniPi Extension board from within CODESYS.
I've been wanting to have a play with Yocto so decided to have a go at getting an image running on a Raspberry Pi. I found plenty of references but no step by step that just worked. This post just covers my notes on how to get going. The Yocto Project Quick Start states "In...
I wanted to extend my home network to a Virtual Private Cloud (VPC) within Amazon Web Services (AWS), primarily for use as a jenkins build farm. I have achieved this using a Raspberry Pi as my Customer Gateway device. This post covers the process of configuring the raspberry pi from scratch and AWS from scratch. I'm...
Up to now I have used win32Diskimager.exe in a windows VM to program images onto SDCards for the Raspberry Pi. For some reason having not done this for a while it has stopped working for me, so I decided to program using OSX directly. Downloading Firstly I downloaded and unzipped the raspbian image in my...
Last May I blogged about Starting with CODESYS on the Raspberry Pi. Since then I have found it a great teaching platform to help others learn CODESYS. My getting started tutorial is now a little out of date, so I thought I would reproduce it using current versions of software. This blog walks through the...
Introduction When I decided to use eclipse to do some cross development for the Raspberry Pi hosted on windows I was surprised to find that I found lots of useful posts elsewhere that gave a part of the solution, or worked well on a Linux host. I found both of the sites below to be...
Static analysis tools look for a wide range of potential errors with code that compilers do not look for. Cppcheck is a an open source static analysis tool, it is extensible and being actively developed. These are the sorts of errors that can be found Out of bounds checking Memory leaks checking Detect possible...